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MK7 Jetta Borla Quad Tip Cat-Back Exhaust System - With ECS Carbon Fiber Rear Diffuser

Enhance your exhaust note while upgrading visual appeal
Requires R-Line or SEL Premium rear bumper
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Assembled By ECS
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Availability: Inventory On Order, ETA Jan 18, 2022
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Product Details

Requires R-Line or SEL Premium rear bumper

Increased exhaust velocity adds power, driving excitement, fuel economy and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. When combined with our ECS Tuning Quad Exit Rear Diffuser your MK7 Jetta will be turning heads with newfound aggressive looks and sound. 

Each Borla exhaust system is built from premium authentic stainless steel, superior to T-400 series knockoffs, to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Our ECS Tuning Quad Tip Rear Diffuser features a deep profile, an aggressive blade design and exposed tip openings to house the Borla 90mm brushed exhaust tips. The diffuser was designed and engineered in-house to add an aggressive appearance upgrade while supporting quad tip exhaust systems. 


** NOTE: The rear valance is only serviceable on R-Line and SEL Premium models, other trim levels will need to convert to the aforementioned trim model rear bumper to use our diffuser (see ES#4040412 instead). 



  • Designed and engineered in-house using state of the art 3D laser scanning and CAD technology for precision fitment 

  • Featured on Jamie Orr's MK7 Jetta 2018 SEMA build and tested on the Nürburgring and the Autobahn

  • Made from lightweight, hand laid epoxy resin pre-impregnated 2x2 twill weave carbon fiber cloth and autoclave cured then clear coated for UV resistance.

  • Mimics the lower section of the bumper & OE valance lines to accentuate OEM features

  • Utilizes the dead space behind the OE valance to simulate a functional diffuser with great depth 

  • Outer blades blend into quad exhaust housings that accommodate up to 3.5" OD exhaust tips, on either side of the diffuser, and will work in tandem with our ECS Quad Tip Axle-Back Exhaust System or Borla Quad Tip Catback.

  • Mounts to OE clip locations and OE holes on the outer edges of the bumper with our supplied, stainless and corrosive resistant zinc hardware.

  • Includes a wrinkle black powdercoated, 5052 aluminum bracket to add rigid mounting to the center of the diffuser.



  • Every Borla system is made with T304 stainless steel for the internals and muffler body 
  • Borla guarantees every muffler with a 1,000,000 mile warranty
  • Slip-on design
  • 2.5" mandrel bent T304 tubing 
  • S-Type Muffler
  • Includes all hangers and clamps
  • Bolts on to stock catback location 
  • Quad 90mm Borla round angle cut tips - Brushed Finish



  • Carbon Fiber Rear Diffuser 

  • Center Mounting Bracket and mounting hardware

  • Borla S-Type Quad Exit Cat-Back Exhaust System



  • Our ECS Tuning Quad Tip Carbon Fiber Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team in our Wadsworth, Ohio facility. We partnered our design and development strategy alongside VW Brand Ambassador, Jamie Orr, along with Borla Performance Industries to bring our ECS Quad Exit Rear Diffuser and Borla Quad Exit Catback Exhaust to a reality for the 2018 SEMA debut! 

  • We strive for the highest level of precision and quality through leading edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.



  • Looking for installation tips? Look no further, we put together a full installation tutorial from start to finish including how to remove your OEM valance in detail! See our Installation PDF under the INSTALLATION Tab for more information. Borla includes printed installation instructions with their exhaust system. 

This Part Fits the Following Vehicles

Make Model Submodel Engine
Volkswagen Jetta VII Sedan 1.4T
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

Kit Contents

Description Brand Qty
Carbon Fiber Rear Valance ECS - Corporate Logo 1
Mounting Bracket - Assembly ECS - Corporate Logo 1
Alloy Steel Button Head Hex Drive Screws Blue-Dyed Zinc-Plated, M8 X 1.25 Mm Thread, 20 Mm Long - EACH Bremmen Parts - Corporate Logo 2
Black Ultra-Corrosion-Resistant Coated Steel Washer For M8 Screw Size, 8.4 Mm ID, 16 Mm OD - EACH Bremmen Parts - Corporate Logo 4
High-Strength Steel Hex Nut Class 10, Zinc Yellow-Chromate Plated, M8 X 1.25 Mm Thread - EACH Bremmen Parts - Corporate Logo 2
Borla S-Type Quad Exit Cat-Back Exhaust System Borla - Corporate Logo 1


ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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